JP6401951B2 - Cement composition and method for producing the same - Google Patents
Cement composition and method for producing the same Download PDFInfo
- Publication number
- JP6401951B2 JP6401951B2 JP2014142868A JP2014142868A JP6401951B2 JP 6401951 B2 JP6401951 B2 JP 6401951B2 JP 2014142868 A JP2014142868 A JP 2014142868A JP 2014142868 A JP2014142868 A JP 2014142868A JP 6401951 B2 JP6401951 B2 JP 6401951B2
- Authority
- JP
- Japan
- Prior art keywords
- caso
- cement composition
- 3cao
- present
- cement
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Curing Cements, Concrete, And Artificial Stone (AREA)
Description
本発明は、土木・建築分野で使用されるセメント組成物およびその製造方法に関する。 The present invention relates to a cement composition used in the field of civil engineering and construction and a method for producing the same.
カルシウムアルミネート系鉱物である３ＣａＯ・３Ａｌ２Ｏ３・ＣａＳＯ４は、膨張材や急硬性セメントの主成分として用いられている（非特許文献１）。普通ポルトランドセメントクリンカーなどに比べて低温で焼成でき、原料として使用する石灰石量も少ないため、低環境負荷型のセメント組成物としても近年注目されている。一方、３ＣａＯ・３Ａｌ２Ｏ３・ＣａＳＯ４を急硬性セメントとして用いる場合には、硬化時間の短縮や貯蔵に伴う硬化時間の変動を小さくすることが望まれていた。 3CaO · 3Al 2 O 3 · CaSO 4 which is a calcium aluminate mineral is used as a main component of an expandable material or a quick-hardening cement (Non-patent Document 1). Since it can be fired at a lower temperature than ordinary Portland cement clinker and the amount of limestone used as a raw material is small, it has recently attracted attention as a low environmental load cement composition. On the other hand, when 3CaO.3Al 2 O 3 .CaSO 4 is used as a rapid-hardening cement, it has been desired to shorten the curing time and to reduce the variation in the curing time accompanying storage.
また、遊離石灰、水硬性化合物、無水セッコウからなるコンクリート用膨張材を高温の炭酸ガス雰囲気で処理することによって、生石灰を含む膨張材の貯蔵性を高めることができることが報告されている（特許文献１）。
しかしながら、この処理を行った膨張材では、接水初期の水和、特に遊離石灰の水和が抑制されることが明らかになっている（非特許文献１）。
Moreover, it is reported that the storage property of the expansion | swelling material containing quick lime can be improved by processing the expansion | swelling material for concrete which consists of a free lime, a hydraulic compound, and anhydrous gypsum in a high temperature carbon dioxide gas atmosphere (patent document). 1).
However, it has been clarified that in the expanded material subjected to this treatment, hydration at the initial stage of water contact, particularly free lime, is suppressed (Non-patent Document 1).
そこで、本発明者は、前記課題を解決すべく、種々の努力を重ねた結果、３ＣａＯ・３Ａｌ２Ｏ３・ＣａＳＯ４を炭酸化処理することで、硬化時間を短縮でき、貯蔵に伴う品質変動を小さくできることを知見し、本発明を完成するに至った。 Therefore, as a result of various efforts to solve the above problems, the present inventor can shorten the curing time by carbonating 3CaO.3Al 2 O 3 .CaSO 4, and change the quality due to storage. Has been found to be small, and the present invention has been completed.
本発明は、硬化時間を短縮し、製品を長期間貯蔵しても一定の硬化時間を確保できるセメント組成物を提供する。 The present invention provides a cement composition capable of shortening the setting time and ensuring a certain setting time even when the product is stored for a long period of time.
すなわち、本発明は、（１）炭酸ガス雰囲気で加熱処理した３ＣａＯ-３Ａｌ２Ｏ３-ＣａＳＯ４を含有してなるセメント組成物、（２）３ＣａＯ-３Ａｌ２Ｏ３-ＣａＳＯ４のＣＯ２含有量が０．１〜１．０％である（１）のセメント組成物、（３）３ＣａＯ-３Ａｌ２Ｏ３-ＣａＳＯ４を２００〜８００℃の炭酸ガス雰囲気で加熱処理して製造してなる（１）または（２）のセメント組成物の製造方法、である。 That is, the present invention is, (1) 3CaO-3Al 2 O 3 comprising the -CaSO 4 cement composition was heat-treated with carbon dioxide gas atmosphere, (2) CO 2 content of 3CaO-3Al 2 O 3 -CaSO 4 (1) the cement composition having an amount of 0.1 to 1.0%, (3) manufactured by heat-treating 3CaO-3Al 2 O 3 —CaSO 4 in a carbon dioxide atmosphere at 200 to 800 ° C. (1) The manufacturing method of the cement composition of (2).
本発明のセメント組成物を使用することにより、製造時のＣＯ２排出量が少なく、従来よりも硬化時間を短縮でき、長期間貯蔵しても硬化時間の変動が少ないセメント組成物を提供することができる。 By using the cement composition of the present invention, it is possible to provide a cement composition that has less CO 2 emission during production, can shorten the curing time than the conventional one, and has little variation in the curing time even when stored for a long period of time. Can do.
以下、本発明を詳細に説明する。
本発明で使用する部や％は特に規定のない限り質量基準である。
また、本発明のセメント組成物とは、セメント組成物、モルタル組成物、コンクリート組成物を総称するものである。
Hereinafter, the present invention will be described in detail.
Parts and% used in the present invention are based on mass unless otherwise specified.
Further, the cement composition of the present invention is a generic term for a cement composition, a mortar composition, and a concrete composition.
本発明のセメント組成物は、基材として３ＣａＯ・３Ａｌ２Ｏ３・ＣａＳＯ４を使用し、炭酸ガスと反応させて合成する。ＣＯ２の含有量は、特に限定されるものではないが、３ＣａＯ・３Ａｌ２Ｏ３・ＣａＳＯ４に対して０．１〜１％程度である。この成分範囲にないと、硬化時間の短縮と貯蔵した際の硬化時間の安定性を確保することが難しい場合がある。また、ＣＯ２含有量が１％を超える範囲では、処理時間を高めてもさらなる増加が得られ難く不経済である。
なお、基材に用いる３ＣａＯ・３Ａｌ２Ｏ３・ＣａＳＯ４とは、カルシアを含む原料と、アルミナを含む原料と、セッコウを含む原料を混合して、キルンなどで熱処理をして得られる。主成分の一部が、アルカリ金属酸化物、アルカリ土類金属酸化物、酸化ケイ素、酸化チタン、酸化鉄、アルカリ金属ハロゲン化物、アルカリ土類金属ハロゲン化物、アルカリ金属硫酸塩、およびアルカリ土類金属硫酸塩などと置換した化合物、あるいは、主成分にこれらが少量固溶した物質も含まれる。
The cement composition of the present invention is synthesized by using 3CaO.3Al 2 O 3 .CaSO 4 as a base material and reacting with carbon dioxide gas. The content of CO 2 is not particularly limited, it is 0.1 to 1% with respect to 3CaO · 3Al 2 O 3 · CaSO 4. If it is not in this component range, it may be difficult to ensure the stability of the curing time when the curing time is shortened and stored. Further, when the CO 2 content exceeds 1%, even if the treatment time is increased, it is difficult to obtain a further increase, which is uneconomical.
3CaO.3Al 2 O 3 .CaSO 4 used for the base material is obtained by mixing a raw material containing calcia, a raw material containing alumina, and a raw material containing gypsum, and performing heat treatment with a kiln or the like. Some of the main components are alkali metal oxides, alkaline earth metal oxides, silicon oxide, titanium oxide, iron oxide, alkali metal halides, alkaline earth metal halides, alkali metal sulfates, and alkaline earth metals A compound substituted with sulfate or the like, or a substance in which a small amount of these is dissolved in the main component is also included.
セメント組成物と反応したＣＯ２は、基材である３ＣａＯ・３Ａｌ２Ｏ３・ＣａＳＯ４と同一粒子中に含有されていることが好ましい。同一粒子中に含有されていない場合や、炭酸カルシウムなどＣＯ２を含有する化合物を３ＣａＯ・３Ａｌ２Ｏ３・ＣａＳＯ４に添加しただけでは本発明の効果は得られない。
本発明のセメント組成物に含まれる３ＣａＯ・３Ａｌ２Ｏ３・ＣａＳＯ４が同一粒子内に炭酸成分を含有したものであるかどうかは電子顕微鏡などによって確認することができる。具体的には、セメント組成物を樹脂で包埋し、アルゴンイオンビームで表面処理を行い、粒子断面の組織を観察するとともに、元素分析を行うことで、炭酸成分が３ＣａＯ・３Ａｌ２Ｏ３・ＣａＳＯ４と同一粒子内に存在しているか確認することができる。
なお、本発明のセメント組成物に含まれる炭酸カルシウムの形態は特に限定されるものではない。
The CO 2 that has reacted with the cement composition is preferably contained in the same particles as the base material 3CaO.3Al 2 O 3 .CaSO 4 . The effect of the present invention cannot be obtained if the particles are not contained in the same particle, or if only a compound containing CO 2 such as calcium carbonate is added to 3CaO.3Al 2 O 3 .CaSO 4 .
Whether or not 3CaO.3Al 2 O 3 .CaSO 4 contained in the cement composition of the present invention contains a carbonic acid component in the same particle can be confirmed by an electron microscope or the like. Specifically, the cement composition is embedded in a resin, surface-treated with an argon ion beam, the structure of the particle cross section is observed, and elemental analysis is performed, so that the carbonic acid component is 3CaO.3Al 2 O 3. it is possible to confirm whether present in CaSO 4 and the same particle.
In addition, the form of calcium carbonate contained in the cement composition of the present invention is not particularly limited.
３ＣａＯ・３Ａｌ２Ｏ３・ＣａＳＯ４は炭酸ガスで処理する前に粉砕処理し、ブレーン比表面積で２０００〜６０００ｃｍ２／ｇに調製することが好ましい。ブレーン比表面積で２０００ｃｍ２／ｇ以下では、硬化時間が長くなる場合がある。また、６０００ｃｍ２／ｇを超えると粉砕に時間がかかる場合がある。 3CaO · 3Al 2 O 3 · CaSO 4 is pulverized prior to treatment with carbon dioxide gas, it is preferable to prepare the 2000~6000cm 2 / g in Blaine specific surface area. If the Blaine specific surface area is 2000 cm 2 / g or less, the curing time may be long. Moreover, when it exceeds 6000 cm < 2 > / g, it may take time for grinding.
３ＣａＯ・３Ａｌ２Ｏ３・ＣａＳＯ４粉末の炭酸ガスでの処理方法は特に限定されるものではなく、３ＣａＯ・３Ａｌ２Ｏ３・ＣａＳＯ４を炭酸ガスに接触させることで合成できるが、特に、２００〜８００℃の高温雰囲気で炭酸ガスと接触させることが、急硬性と貯蔵安定性の観点から好ましい。
本発明でいう炭酸化処理容器は特に限定されるものではなく、クリンカと炭酸ガスを接触させ反応させることが出来ればよく、電気炉でも良いし、流動層式加熱炉でも良いし、クリンカを粉砕するミルでも良い。
本発明に使用される３ＣａＯ・３Ａｌ２Ｏ３・ＣａＳＯ４に含まれるＣＯ２は、無機炭素分析法によって測定することができる。３ＣａＯ・３Ａｌ２Ｏ３・ＣａＳＯ４に塩酸をかけ、発生するＣＯ２を吸収液に吸収させ、滴定法によって定量することができる。具体的な装置としては、日本アンス株式会社製「クーロメーター」などを用いることができる。
The method for treating 3CaO.3Al 2 O 3 .CaSO 4 powder with carbon dioxide gas is not particularly limited, and synthesis is possible by bringing 3CaO.3Al 2 O 3 .CaSO 4 into contact with carbon dioxide gas. It is preferable to make it contact with a carbon dioxide gas in a high temperature atmosphere of ˜800 ° C. from the viewpoint of rapid hardening and storage stability.
The carbonation treatment container referred to in the present invention is not particularly limited, as long as the clinker and carbon dioxide gas can be brought into contact with each other and reacted, and an electric furnace or a fluidized bed heating furnace may be used. It can be a mill.
CO 2 contained in 3CaO · 3Al 2 O 3 · CaSO 4 used in the present invention can be measured by an inorganic carbon analysis method. Hydrochloric acid is applied to 3CaO.3Al 2 O 3 .CaSO 4 to absorb the generated CO 2 in the absorption liquid, and the amount can be determined by titration. As a specific apparatus, a “Coolometer” manufactured by Nippon Anse Co., Ltd. can be used.
本発明では減水剤を併用できる。減水剤はセメントに対する分散作用や空気連行作用を有し、流動性改善や強度増進するものの総称であり、具体的には、ナフタレンスルホン酸系減水剤、メラミンスルホン酸系減水剤、リグニンスルホン酸系減水剤、およびポリカルボン酸系減水剤などが挙げられるが、特には限定されるものではない。 In the present invention, a water reducing agent can be used in combination. Water-reducing agent is a generic name for those that have a dispersing action and air-entraining action on cement, and improve fluidity and strength. Although a water reducing agent, a polycarboxylic acid type water reducing agent, etc. are mentioned, it does not specifically limit.
本発明では、硬化時間を調製する目的で、従来使用されている促進剤や遅延剤を使用することができる。促進剤としては、水酸化カルシウム、塩化カルシウム、硝酸カルシウムなどのカルシウム塩、無水セッコウ、硫酸ナトリウム、硫酸アルミニウム、硫酸鉄などの硫酸塩などが挙げられる。これらの２種以上を併用しても構わない。 In the present invention, conventionally used accelerators and retarders can be used for the purpose of adjusting the curing time. Examples of the accelerator include calcium salts such as calcium hydroxide, calcium chloride, and calcium nitrate, and sulfates such as anhydrous gypsum, sodium sulfate, aluminum sulfate, and iron sulfate. Two or more of these may be used in combination.
本発明では、石灰石微粉末、高炉徐冷スラグ微粉末、下水汚泥焼却灰やその溶融スラグ、都市ゴミ焼却灰やその溶融スラグ、パルプスラッジ焼却灰などの混和材料、減水剤、ＡＥ減水剤、高性能減水剤、高性能ＡＥ減水剤、消泡剤、増粘剤、防錆剤、防凍剤、収縮低減剤、ポリマー、凝結調整剤、ベントナイトなどの粘土鉱物、ならびに、ハイドロタルサイトなどのアニオン交換体などのうちの１種または２種以上を、本発明の目的を実質的に阻害しない範囲で使用することが可能である。 In the present invention, limestone fine powder, blast furnace slow-cooled slag fine powder, sewage sludge incineration ash and its molten slag, admixture materials such as municipal waste incineration ash and its molten slag, pulp sludge incineration ash, water reducing agent, AE water reducing agent, high Performance water reducing agent, high performance AE water reducing agent, antifoaming agent, thickening agent, rust preventive agent, antifreeze agent, shrinkage reducing agent, polymer, setting modifier, clay minerals such as bentonite, and anion exchange such as hydrotalcite One or more of the body and the like can be used as long as the object of the present invention is not substantially inhibited.
本発明では骨材を併用できる。細骨材としては、適度な施工性及び強度発現性が得られれば、特に限定されるものではない。 In the present invention, aggregate can be used in combination. The fine aggregate is not particularly limited as long as moderate workability and strength development are obtained.
以下に実験例を挙げて本発明をさらに具体的に説明するが、本発明はこれら実験例に限定されるものではない。 The present invention will be described more specifically with reference to experimental examples below, but the present invention is not limited to these experimental examples.
「実験例１」
試薬の炭酸カルシウム、アルミナ、セッコウを原料とし、３ＣａＯ・３Ａｌ２Ｏ３・ＣａＳＯ４の量論比で計量した後、混合粉砕を行い、１３５０℃で焼成して、３ＣａＯ・３Ａｌ２Ｏ３・ＣａＳＯ４を合成した。合成したクリンカをボールミルでブレーン比表面積４，０００ｃｍ２／ｇと６，０００ｃｍ２／ｇに粉砕したものを、ＣＯ２１００％、温度６００℃の雰囲気下で炭酸化処理を行い、処理時間を変えて表１に示すＣＯ２含有量のセメント組成物を調製した。
調製したセメント組成物を紙袋に充填してシールし、３か月間３０℃６０％室内で貯蔵した。貯蔵前後で、練り水をセメント組成物の合計１００部に対して５０部を使用し、熱量計を用いて硬化に伴う発熱開始時間と発熱量を定量した。
"Experiment 1"
Using calcium carbonate, alumina, and gypsum as reagents as raw materials, weighed at a stoichiometric ratio of 3CaO · 3Al 2 O 3 · CaSO 4 , mixed and pulverized, fired at 1350 ° C., and 3CaO · 3Al 2 O 3 · CaSO 4 was synthesized. Those synthesized clinker was ground to a Blaine specific surface area of 4,000 cm 2 / g and 6,000 2 / g in a ball mill, CO 2 100%, it performs carbonation process in an atmosphere of temperature of 600 ° C., changing the processing time The cement compositions having the CO 2 content shown in Table 1 were prepared.
The prepared cement composition was filled in a paper bag, sealed, and stored in a room at 30 ° C. and 60% for 3 months. Before and after storage, 50 parts of the kneading water was used with respect to 100 parts of the cement composition in total, and the heat generation start time and the heat generation amount due to curing were quantified using a calorimeter.
＜使用材料＞
炭酸カルシウム：試薬１級
アルミナ：試薬１級
セッコウ：二水セッコウ、試薬１級
水：水道水
<Materials used>
Calcium carbonate: Reagent first grade alumina: Reagent first grade gypsum: Two water gypsum, Reagent first grade water: Tap water
＜水和発熱速度の測定方法＞
試料１ｇに対して混練水を１ｇ計量し、２０℃環境にて注水から４８ｈｒまで測定を行った。測定にはマルチマイクロカロリーメーター（東京理工社製ＭＭＣ−５１１Ｃ６）を用いた。
<Measurement method of hydration exotherm rate>
1 g of kneaded water was weighed with respect to 1 g of the sample, and measurement was performed from water injection to 48 hours in a 20 ° C. environment. A multi-micro calorimeter (MMC-511C6 manufactured by Tokyo Riko Co., Ltd.) was used for the measurement.
表１から、高温雰囲気で炭酸ガスと接触させた３ＣａＯ・３Ａｌ２Ｏ３・ＣａＳＯ４は、未処理の３ＣａＯ・３Ａｌ２Ｏ３・ＣａＳＯ４に比べて、貯蔵前の硬化開始時間が短縮し、４８ｈまでの累積総発熱量が高いことが分かる。また、比較例に対して貯蔵後の硬化開始時間の遅れや４８ｈ累積発熱量の低下が少なく、貯蔵性が向上している。 From Table 1, 3CaO · 3Al 2 O 3 · CaSO 4 brought into contact with carbon dioxide gas in a high temperature atmosphere has a shorter curing start time before storage than untreated 3CaO · 3Al 2 O 3 · CaSO 4 , It can be seen that the cumulative total heat generation up to 48h is high. Further, compared with the comparative example, there is little delay in the curing start time after storage and a decrease in the accumulated calorific value for 48 hours, and the storage property is improved.
「実験例２」
ブレーン比表面積４，０００ｃｍ２／ｇのものについて、炭酸化処理時間を３０分に固定し、炭酸化処理温度を表２に示すように変化させたこと以外は実験例１と同様に行った。
"Experimental example 2"
The test was conducted in the same manner as in Experimental Example 1 except that the carbonation treatment time was fixed at 30 minutes and the carbonation treatment temperature was changed as shown in Table 2 for the one having a specific surface area of 4,000 cm 2 / g.
表２から、炭酸ガスと接触させた３ＣａＯ・３Ａｌ２Ｏ３・ＣａＳＯ４は、未処理の３ＣａＯ・３Ａｌ２Ｏ３・ＣａＳＯ４に比べて、貯蔵前の硬化開始時間が短縮し、４８ｈまでの累積総発熱量が高いことが分かる。また、比較例に対して貯蔵後の硬化開始時間が早く、４８ｈ累積発熱量が高いことから、貯蔵性が向上している。
また、実施例においても２００℃以上で炭酸化処理し、ＣＯ２含有量が０．１％以上の場合（実験No.2-3,1-2,2-4）では、硬化開始時間の短縮が大きく、貯蔵後の硬化時間の変化が少ないことが分かる。
From Table 2, 3CaO · 3Al 2 O 3 · CaSO 4 brought into contact with carbon dioxide gas has a shorter curing start time before storage than untreated 3CaO · 3Al 2 O 3 · CaSO 4 , up to 48 h. It can be seen that the cumulative total heat generation is high. Moreover, since the hardening start time after storage is quicker than that of the comparative example, and the accumulated calorific value for 48 hours is high, the storability is improved.
Also in the examples, when the carbonation treatment is performed at 200 ° C. or more and the CO 2 content is 0.1% or more (Experiment No. 2-3, 1-2, 2-4), the curing start time is shortened. It can be seen that there is little change in the curing time after storage.
本発明のセメント組成物は、従来に比べて硬化時間を短縮でき、貯蔵期間が長くなっても、硬化時間を安定して確保できるので、土木および建築用途で広範に利用できる。 The cement composition of the present invention can be used in a wide range of civil engineering and construction applications because the setting time can be shortened compared to the conventional case and the setting time can be secured stably even if the storage period is long.
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2014142868A JP6401951B2 (en) | 2014-07-11 | 2014-07-11 | Cement composition and method for producing the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2014142868A JP6401951B2 (en) | 2014-07-11 | 2014-07-11 | Cement composition and method for producing the same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2016017025A JP2016017025A (en) | 2016-02-01 |
| JP6401951B2 true JP6401951B2 (en) | 2018-10-10 |
Family
ID=55232510
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2014142868A Active JP6401951B2 (en) | 2014-07-11 | 2014-07-11 | Cement composition and method for producing the same |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP6401951B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP7518034B2 (en) * | 2021-04-26 | 2024-07-17 | デンカ株式会社 | CO2 content measurement method |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5927734B2 (en) * | 1976-04-08 | 1984-07-07 | 株式会社トクヤマ | Cement manufacturing method |
| JP5744499B2 (en) * | 2010-12-09 | 2015-07-08 | 電気化学工業株式会社 | Grout cement composition and grout material |
-
2014
- 2014-07-11 JP JP2014142868A patent/JP6401951B2/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| JP2016017025A (en) | 2016-02-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| TWI478891B (en) | Expandable material and its manufacturing method | |
| JP6392553B2 (en) | Method for producing hardened cement and hardened cement | |
| JP7509867B2 (en) | Cement admixture, expansive material, and cement composition | |
| JP2014148434A (en) | Hydraulic composition | |
| JP6067367B2 (en) | Hydraulic composition | |
| CN103261116B (en) | Cement admixture, cement composition, and method for reducing hexavalent chromium using cement composition | |
| JP7000714B2 (en) | Cement composition and its manufacturing method, and mortar or concrete manufacturing method | |
| JP6234739B2 (en) | Method for producing hardened cement and hardened cement | |
| JP6238579B2 (en) | A binder for carbonated building materials and a method for producing the same. | |
| JP4579772B2 (en) | Cement admixture and super fast cement | |
| TWI815994B (en) | Cement admixtures, expanding materials and cement compositions | |
| KR20140115420A (en) | Cement and concrete composition | |
| JP6985547B1 (en) | Grout material, grout mortar composition and cured product | |
| CN117580812A (en) | Cement admixture, method for producing cement admixture, and cement composition | |
| JP2020083660A (en) | Cement admixture, expansion material, and cement composition | |
| JP6401951B2 (en) | Cement composition and method for producing the same | |
| WO2022070761A1 (en) | Ground-improving material slurry, ground-improving material cured product, and ground improvement method | |
| JP6195460B2 (en) | Method for producing anti-bleeding agent for concrete and method for producing cement composition containing the anti-bleeding agent for concrete | |
| JP6158585B2 (en) | CaO-Al2O3-based clinker, cement admixture using the same, cement composition, and method for producing the same | |
| JP2015224168A (en) | Cement composition and production method thereof | |
| JP6207992B2 (en) | Cement admixture and cement composition-hardened cement using the same | |
| WO2021024853A1 (en) | Cement admixture and hydraulic composition | |
| JP5701546B2 (en) | Spraying material and spraying method using the same | |
| JP6186170B2 (en) | Cement quick setting material and cement composition using the same | |
| JP7260998B2 (en) | Expansive composition, cement composition and cement-concrete |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A621 | Written request for application examination |
Free format text: JAPANESE INTERMEDIATE CODE: A621 Effective date: 20170424 |
|
| A977 | Report on retrieval |
Free format text: JAPANESE INTERMEDIATE CODE: A971007 Effective date: 20180112 |
|
| A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20180123 |
|
| RD02 | Notification of acceptance of power of attorney |
Free format text: JAPANESE INTERMEDIATE CODE: A7422 Effective date: 20180226 |
|
| A521 | Request for written amendment filed |
Free format text: JAPANESE INTERMEDIATE CODE: A821 Effective date: 20180226 |
|
| A521 | Request for written amendment filed |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20180315 |
|
| TRDD | Decision of grant or rejection written | ||
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20180828 |
|
| A61 | First payment of annual fees (during grant procedure) |
Free format text: JAPANESE INTERMEDIATE CODE: A61 Effective date: 20180910 |
|
| R150 | Certificate of patent or registration of utility model |
Ref document number: 6401951 Country of ref document: JP Free format text: JAPANESE INTERMEDIATE CODE: R150 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |